package com.stylefeng.guns.modular.wehcat.util;

import net.sf.json.JSONObject;

import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Formatter;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;

public class Sign {

    public static Map<String, String> sign(String jsapi_ticket, String url) {
        Map<String, String> ret = new HashMap<String, String>();
        String nonce_str = create_nonce_str();
        String timestamp = create_timestamp();
        String string1;
        String signature = "";

        //注意这里参数名必须全部小写，且必须有序
        string1 = "jsapi_ticket=" + jsapi_ticket +
                "&noncestr=" + nonce_str +
                "&timestamp=" + timestamp +
                "&url=" + url;
        System.out.println(string1);

        try {
            MessageDigest crypt = MessageDigest.getInstance("SHA-1");
            crypt.reset();
            crypt.update(string1.getBytes("UTF-8"));
            signature = byteToHex(crypt.digest());
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

        ret.put("url", url);
        ret.put("jsapi_ticket", jsapi_ticket);
        ret.put("nonceStr", nonce_str);
        ret.put("timestamp", timestamp);
        ret.put("signature", signature);

        return ret;
    }

    private static String byteToHex(final byte[] hash) {
        Formatter formatter = new Formatter();
        for (byte b : hash) {
            formatter.format("%02x", b);
        }
        String result = formatter.toString();
        formatter.close();
        return result;
    }

    private static String create_nonce_str() {
        return UUID.randomUUID().toString();
    }

    private static String create_timestamp() {
        return Long.toString(System.currentTimeMillis() / 1000);
    }

    //----------------------------------------------------------
    public static String getAccessToken() {
        String access_token = "";
        String grant_type = "client_credential";//获取access_token填写client_credential
        String AppId = "wx224e8b702efc0e2b";//第三方用户唯一凭证
        String secret = "d078119fa1077d86c2256bc90e6f6519";//第三方用户唯一凭证密钥，即appsecret
        //这个url链接地址和参数皆不能变
        String url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=" + grant_type + "&appid=" + AppId + "&secret=" + secret;

        try {
            URL urlGet = new URL(url);
            HttpURLConnection http = (HttpURLConnection) urlGet.openConnection();
            http.setRequestMethod("GET"); // 必须是get方式请求
            http.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            http.setDoOutput(true);
            http.setDoInput(true);
            System.setProperty("sun.net.client.defaultConnectTimeout", "30000");// 连接超时30秒
            System.setProperty("sun.net.client.defaultReadTimeout", "30000"); // 读取超时30秒
            http.connect();
            InputStream is = http.getInputStream();
            int size = is.available();
            byte[] jsonBytes = new byte[size];
            is.read(jsonBytes);
            String message = new String(jsonBytes, "UTF-8");
            JSONObject demoJson = JSONObject.fromObject(message);
            System.out.println("JSON字符串：" + demoJson);
            access_token = demoJson.getString("access_token");
            is.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return access_token;
    }

    public static String getTicket(String access_token) {
        String ticket = null;
        String url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" + access_token + "&type=jsapi";//这个url链接和参数不能变
        try {
            URL urlGet = new URL(url);
            HttpURLConnection http = (HttpURLConnection) urlGet.openConnection();
            http.setRequestMethod("GET"); // 必须是get方式请求
            http.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            http.setDoOutput(true);
            http.setDoInput(true);
            System.setProperty("sun.net.client.defaultConnectTimeout", "30000");// 连接超时30秒
            System.setProperty("sun.net.client.defaultReadTimeout", "30000"); // 读取超时30秒
            http.connect();
            InputStream is = http.getInputStream();
            int size = is.available();
            byte[] jsonBytes = new byte[size];
            is.read(jsonBytes);
            String message = new String(jsonBytes, "UTF-8");
            JSONObject demoJson = JSONObject.fromObject(message);
            System.out.println("JSON字符串：" + demoJson);
            ticket = demoJson.getString("ticket");
            is.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ticket;
    }

    public static String SHA1(String decript) {
        try {
            MessageDigest digest = java.security.MessageDigest.getInstance("SHA-1");
            digest.update(decript.getBytes());
            byte messageDigest[] = digest.digest();
            // Create Hex String
            StringBuffer hexString = new StringBuffer();
            // 字节数组转换为 十六进制 数
            for (int i = 0; i < messageDigest.length; i++) {
                String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
                if (shaHex.length() < 2) {
                    hexString.append(0);
                }
                hexString.append(shaHex);
            }
            return hexString.toString();

        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return "";
    }

    public   static   Map<String ,String> getSign(String url){
        Map<String ,String> map=new HashMap<>();
       try {
           //1、获取AccessToken
           java.lang.String accessToken = getAccessToken();
           //2、获取Ticket
           java.lang.String jsapi_ticket = getTicket(accessToken);
           //3、时间戳和随机字符串
           java.lang.String noncestr = UUID.randomUUID().toString().replace("-", "").substring(0, 16);//随机字符串
           java.lang.String timestamp = java.lang.String.valueOf(System.currentTimeMillis() / 1000);//时间戳
//           System.out.println("accessToken:"+accessToken+"\njsapi_ticket:"+jsapi_ticket+"\n时间戳："+timestamp+"\n随机字符串："+noncestr);
           //4、获取url
//           java.lang.String url="http://www.luiyang.com/add.html";
        /*根据JSSDK上面的规则进行计算，这里比较简单，我就手动写啦
        String[] ArrTmp = {"jsapi_ticket","timestamp","nonce","url"};
        Arrays.sort(ArrTmp);
        StringBuffer sf = new StringBuffer();
        for(int i=0;i<ArrTmp.length;i++){
            sf.append(ArrTmp[i]);
        }
        */
           //5、将参数排序并拼接字符串
           java.lang.String str = "jsapi_ticket="+jsapi_ticket+"&noncestr="+noncestr+"&timestamp="+timestamp+"&url="+url;
           //6、将字符串进行sha1加密
           java.lang.String signature =SHA1(str);
//           System.out.println("参数："+str+"\n签名："+signature);
           map.put("appId","wx224e8b702efc0e2b");
           map.put("noncestr",noncestr);
           map.put("timestamp",timestamp);
           map.put("signature",signature);
       }catch (Exception r){
           r.printStackTrace();
       }
       return map;
    }
}